function FormActionXssTest::testFormActionXss

Tests form action attribute for XSS.

File

core/tests/Drupal/KernelTests/Core/Form/FormActionXssTest.php, line 75

Class

FormActionXssTest

Ensures that a form's action attribute can't be exploited with XSS.

Namespace

Code

public function testFormActionXss() : void {
  // Create a new request with a uri which attempts XSS.
  $request_stack = \Drupal::service('request_stack');
  /** @var \Symfony\Component\HttpFoundation\RequestStack $original_request */
  $original_request = $request_stack->pop();
  // Just request some more so there is no request left.
  $request_stack->pop();
  $request_stack->pop();
  $request = Request::create($original_request->getSchemeAndHttpHost() . '/test/"injected=\'attribute\'close="');
  $request->setSession(new Session(new MockArraySessionStorage()));
  $request_stack->push($request);
  $form = \Drupal::formBuilder()->getForm($this);
  $markup = \Drupal::service('renderer')->renderRoot($form);
  $this->setRawContent($markup);
  $elements = $this->xpath('//form');
  $action = isset($elements[0]['action']) ? (string) $elements[0]['action'] : FALSE;
  $injected = isset($elements[0]['injected']) ? (string) $elements[0]['injected'] : FALSE;
  $this->assertSame('/test/"injected=\'attribute\'close="', $action);
  $this->assertRaw('action="/test/"injected='attribute'close=""');
  $this->assertNotSame('attribute', $injected);
}